synth objects for max msp?

I’d like to know if there are any synth externals for max that I can buy that some real sound engineers have spent some time on designing?

I am tired of the synths that I am currently able to make with the general max objects. Getting into c-sound, but I need a bunch of nice keyboard synths NOW for a children’s game, and I am even ready to pay for it – can any of you give me some directions?

Thanks for this link. I have tried this, and yes, these instruments are fine. However, I need more than this … for example, I also need a synth sound that doesn’t fade out like many of the physical model instruments do …